Fuel pump



2 Sheets-sneer 1 A Y 2,.. 1 Z v3.5. .llhmmmmm Aug- 27, 1929- c. H. KNuDsEN FUEL PUMP Original Filed July 24, 1923 Aug. 27, 1929. l C, H KNUDSEN 1,726,303

FUEL PUMP Original Filed July 24. 1923 2 Sheets-Sheet, 2

lllllllllllllllll INVENTOR fdf'/ f /f/masea ATTORNEYS tL?o ,tented Aug. 27,

@ARL 15, KNUDSE, OIF BRGOKLYN, NEW YORK, .SSGNUR T THE IKNUDSEN MOTOR T1011', @LF WILWHNGTOL DELA'WARE, A CRERATON 0F DELWARE.

FUEL YUM?.

.Application led July 241, 1923, Serial This invention relates to fuel pumps and particularly to pumps of this class designed for use in pumping i'ucl oil to the spray nozales ot internal combustion engines, as well as to the provision ot improved means for automatically governing the pump action; and the object of the invention is to provide a pump mechanism of the class specified whereby a predetermined iiuel charge at a predetermined pressure may be supplied to the spray nozzle or nozzles ot a moto proportionately to the speed o the moto said pump mechanism being controlled by an automatically Vactua-ted governor'deviceg'a. turther object being to provide means for regulating or adjusting the action of the governor to control and regulate the tuel i'eed to the spray nozzle or nozzles ot' a motor; a 'further object being to provide improved means involving levers and cranks 'for actuating the pump or pump rod or rods of the mechanism to provide a simple and yet positive operation thereof, and to regulate the throw of the pump rod or rods through said governor mechanism; and with these and other objects in view, the invention consists in a 'fuel pump mechanism ot the class and for the purpose specified, which is simple in construction and operation, efficient in use, and which is constructed as hereinafter described and claimed.

The invention is fully disclosed in the fol-- lowing specification, of which the accom panying drawing forms a part, in which the separate parts ot my improvement are designated by suitable reference characters in each of the views, and in which Fig. 1 is a sectional view 'through my improved pump mechanism showing. certain operative parts thereof, the section being on the line 1-*1 of Fig. 2 of the drawing.

Fig. V2 is apartial section on the line 2-2 of Fig.. 1. i

llig. 3 1s a partial section on the line 3--3 ot Fig. 1.

llig. l is a partial section on the line 4-4 of Fig. 2'; and,

Fig. 5 is a partial section on the line 5-5 of Fig. 1.

ln the construction shown I provide 'a frame or casing which may be ot any desired height and which is of box-shaped tormation, said casing being provided with a hearing'p'portion 11, in which is mounted a no. seance. nene-wea pm i, i927.

bearing 12 for a shaft 13. rthe shaft 13 eX" tends longitudinally through the casing and is provided at 'its tree end with a 'flange 14 keyed or otherwise formed integrally therewith,I rllhe iiange 1-1 facilitates the coupling of a motor shaft 15 indicated in dotted lines in Figs. 2 and 4 of the drawing with the sha-.tt 13, and the motor shaft 15 extends through an aperture 16 in 'the casing 10.

rEhe top of the casing 10 is open and closed by two cover members 17 and 18, the cover member 17 being provided with a projection 19 upon which is mounted a pump body 2O held in place by screws or bolts 21. Formed in the cover memberl 17 and casing 10 is a large rib or webstructure 22 clearly shown in Fig. 1 of the drawing, and in the cover member 17 is another rib or web structure 23, and the cover member 1 7 and casing 10 are provided with other bosses 24, in which a bellcrank 25 is pivotally mounted.

Keyed to the sha-tt 13 is a cam 26 which in the construction shown is provided with two grooved cam faces 27 oppositely arranged on said cam as clearly shown in Figj of the drawing. Pivotally mounted in the web structure 22 and cover member 17 is a shaft 28 on which is pivotally mounted y,two arms 29, the free ends ot' which are yoke-shaped in 'form to receive and support rollers 30 which bear upon the cam 26 and are adapted to operate in the cam grooves 27. The upper faces of the arms 29 vare grooved as shown at 31 in Fig. 2 of the drawing and rollers 32 mounted lin connection with the 'tree end portions of arms 33 are adapted to operate in the grooves 31. The arms 33 are pivotally mounted in connection with independent eX- tensions of a rocker arm 34 as clearly shown in Figs. 1 and l of the drawing, said rocker arm being mounted on a shaft 35 between the adjacent faces of the casing and cover member 17 and in the web structure 22.

To the other end of the rocker arm 34 is pivotally mounted anv adjustable rod 36 which 1s pivotally mounted to an arm 37 of the bellcrank 25. Another varm 38 of said bell-crank is provided witha coil spring 39, the other end of which is coupled with an adjustment yscrew 40, whereby the tension of the spring 39 may be regulated, and said bell-crank is also provided with a yoke-shaped arm Zl1 Vhaving rounded end portions 42 adapted to ybear upon a bearing 43 on a sliding sleeve 44 movcel able longitudinally of the shaft 13. Pivoted to the sleeve 44 are two or more governor weights 45 held in normal'position by light springs 46, and the weights 45 are provided with outwardly directed linger pieces 47 adapted to operate in an annular groove 48 formed in a tubular extension 49 secured to or forming a part of the flange 14 as clearly shown, in Fig. 2 of the drawing.

Mounted in the cover memb'er 17 and the web portion 23 thereof isa rod 50 on which is mounted two arms 5l which extend over and operate in connection with the rollers 32 as clearly shown in Figs. 1 and 4 of the drawing.

A part of the extension 19 of the cover member 17 is made hollow as shown at 52 and the remaining structure is drilled to forman aperv ture 53, with which the fuel supply pipe 54 is` y sleeves 60 are held in place by screws 62, the lower ends of which are aperturedl to place the'bores of the sleeves 60 in communication with horizontal bores 63 in the pump body 2() as clearly shown in Fig. 1 of the drawing.

Mounted in the pump body are sleeve guides 64, in which pump rods 65 are slidably mounted, said rods being grooved to form an oil seal where they slide in the sleeve 64 and extend below said sleeve and are provided at their free ends with collars 66 forming spring seats for conical spiral springs 67 which normally hold the rounded conical ends 68 of the pump rods 65 in engagement with the top faces of the arms51. The other ends of the pumprods 65 extend upwardly into pump chambers 69, with which the passages 63 communicate, and suitable strainer devices are employed to strain the fuel oil as it enters the pump chambers 69.. Mounted in the pump body 20 above the pump chambers 69 are tubular plugs 71 in which are mounted check-valves 72, and at 73 are couplings for attaching feed pipes 74 with the sleeve plugs 71, and these feed pipesextend to the spray nozzles of the motor in the usual manner.

The operation of my fuel pump will be readily understood from the foregoing descriptlon when taken in connection with the accompanying drawings and following statement. Fuel-oil is first fed into the pump chambers 69 in the pump body 20 through the pipe 54 and the bores 56, 57 v and 63 and through the sleeves 60 in this operation, through the pump chambers 69 and feed pipes 7 4 to the nozzles of the motor, and when all of these bores, feed pipes and 'the lilreare filled the motor will be ready for starting and the pump put into action. As the motor shaft 1.5 which is indicated in dotted lines in the drawing rotates, the shaft 13 with the cam 26 thereon as well as the sleeve 44 is correspondingly rotated, thus bringing the governor device comprising the sleeve 44 and governor weights 45 into action and causing the sleeves 44 to be moved inwardly and longitudinally of. the shaft 13, which operation will rock the bell-crank 25 through the yoke-head 41, and the rocking of the bell-crank 25 will correspondingly operate the arm 37 thereof, and through the adjustable rod 36 the rocker arm 34 is actuated, thus imparting a sliding movement to the arms 33 carrying the rollers 32. The action of the cam 23 or the cam grooves 27 thereof will intermittently permit the arms 29 and rollers 30 thereof to drop into said cam grooves,thus lowering the arms 29, 33 and 51, and thepump rods 65 are correspondingly moved downwardly by the springs 67, allowing additional fuel oil to enter the fuel chamber 69 to take up for the rod displacement in said chamber, and as the cam continues to rotate, the arms 29,33 and 5l are againl raised andthe pump rod 65 correspondingly raised, in which operation the check-valves 61 and 58 are closed and the fuel oil'in the pump chambers 69 is forced under pressure through the feed pipes 74 to force or spray theoil fromthenozzleson themotorintheusual manner, and it will be understood that theabove operation is intermittently performed in the separate 'pum chambers 69 and through the feed pipes 174 to separate and independent spray nozzles, and while I'have shown and described but two pump rods and the various parts cooperating therewith, one or more of these may be employed, and it is preferred that a single pump unit, comprising the 'pump rod 65, pump chamber 69 and feed pipes 74 be employed for each spray nozzle, but'this is not absolutely essential.

-From the foregoing, it will also be apparent that as the speed of the motor increases, the governor weights 45 are moved outwardly by centrifugal force against the tension of the springs 46 as wellas the tension of the spring 39, which controls the action of said governors, and the ratio of movement or travel of the pump rods 65 is automatically regulated; 'K

into the motor, while the cam 26 or the grooves 27 therein control the rapidity'efthe action of the pump rods by reason of their mounting on the shaft 13, which is coupled with the motor shaft 15.

ln brief, the action of my improved fuel pump consists simply in the downward intermittent movement of the pump rods 'to admit additional fuel oilinto the fuel chambers, and to force the said additional fuel into a fuel spray nozzle in the operation of the motor, means being employed to regulate and adjust the throw and the ratio of the throw, and this is accomplished through the adjustment provided in the rod 36, which will regulate the relative position of the rollers 32 on the arms 29 and 5l, as does the position of the rollers 32 whichcontrol the ratio of movement imparted to the rods 65 by the cam 26 or the cam faces 27 thereof and not by the depth of saidi cam faces or grooves.

lt will be understood that while I have shown certain details of construction for carrying my invention into eiect, that I am not necessarily limited to these details, And various changes therein 'and modifications thereof may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what l lclaim as new and desire to secure by Letters Fatent, is

l.. In a pump of the class described emn` ploying a pump element, means involving two levers having substantially oppositely disposed fulcrums andA a reelprocating lever positioned therebetween, whereby the operation of one of the first named( levers will impart to the other of said first named levers and said pump element, direct increasedor decreasedv named levers. s

2., In a pump of the class described comprising a pump element and cam, a plurality of levers disposed between said cam and i said element, one lof said levers being directly operated by said cam, another of said levers operating directly in connection with said element, said last named levers having substantially oppositely disposed fulcrums and extending in substantially parallel relation, and

the other of said levers being disposed between the first named levers and adapted to control and regulate the direct increase or vdecrease movement imparted to said element through said levers and said cam.

3. In a pump of the class described comprising a pump element and cam, a plurality of levers disposed between said cam and said element, one of said levers being directly operated by said cam, another of said levers operating directly in connection with said element, said last named levers having substantially oppositely disposed fulcrums and eX- tending 'in substantially parallel relation, andthe other of said levers being disposed between the first named levers and adapted to control and regulate the direct increase or 'decrease movement imparted to said element through said levers and said cam, and means involving a governor for controlling the action of said last named lever.

4,., In a pump of t'ie class described corn-l prising a pump element and cam, a'A plurality of levers disposed between said cam and said element, one of said levers being directly operated by said cam, another ofl said levers operating directly in connection ,with said element, said last named levers having substantially oppositely disposed fulcrums and extending in substantially parallel relation, and the other of said levers being disposed between the irs't named levers and adapted to control and 'regulate the direct increase or decrease `movementimparted to said element through said levers and said cam, means involving a governor for controlling the action of said last named lever, and tensional means for normallyliolding said *element in engagement with the second named lever.

5. A pump mechanism of the class described comprising a. ump body in Awhich is formed a pump cliam er, a plunger mounted in said body and extending into said chamber, means involving aca'm for normally retaining said plunger in a raised position, a plurality of levers disposed' between said cam and said plunger, two of said levers having substantially oppositely disposed fulcrums, and the other of said levers being disposedl between the first named levers and adapted to control and regulate the movement imparted to said plunger, and means involving said cam and `levers for permitting sudden downward movement of the plunger to admit oil into said chamber and for successively moving the plunger upwardly to displace the oil previously admitted into said chamber in the downward movement of said plunger.

6. A pump mechanism for discharging fuel oi-l under high pressure from a suitable spray nozzle, comprisin a pump body in which is formed a pump camber, a plunger mounted in said body and extending into said chamber,

said plunger being normally retained in a raised position, means permitting of the sudden 4.downward movement of the plunger to admit oil into said chamber and for succes# sively movin said plunger upwardly to displace the oi previously admitted to said chamber in the downward movement of said plunger, said means involving a cam, a plurality of levers disposed between the cam and the plunger, two of said levers having substantially oppositely disposed fulcrums, and the other of said levers being disposed between the first named levers and adapted to control and regulate the movement imparted to said plungeru 7. A pump mechanism for dischar 'ng fuel oil under high pressure from a suit/a le spray nozzle, comprising a pump body in which is formed a pump chamber, a plunger mounted in said body and extending into said chamber, said plunger being normally retained in a raised position, means permitting 'ot the sudden downward movement of the vplunger to admit oil into said chamber and tor sucv cessively moving said plunger upwardly to displace the oil previously admitted to said chamber in the downward movement ot said plunger, said means involving a cam, a plurality of levers disposed between the cam and the plunger, two of said levers having substantially oppositely disposed tulcrums, the other of said levers being disposed between the irs't named levers and adapted to control and regulate the movement 'imparted to said plunger, and automatically operated means for imparting movement to said last named lever.

8. A pump mechanism for discharging tuel oil under highfpressure from a suitable spray nozzle comprising a ump body in which is formed a pump cham er, a plunger mounted in said body and extending intol said chamber.

means involving a cam and a plurality ot levers disposed between the cam. and said plunger for actuating said plunger whereby in one cycle ot the cam action, the plunger will be retained in a raised position in said chamber through substantially three quarters ot such cycle of operation and whereby in substantially the other quarter ot the cycle ot operation, said plunger is given sudden downward movement to admit oil into said cham' ber and successive upward movement to displace the oil admitted into said chamber in the downward movement ot the plunger.,

9. A pump mechanism :tor discharging i'uel oil under high pressure from a suitable spra nozzle, vcomprising a ump body in which 1s formed a pump cham er, a plunger mounted in said body and extending into said chamber, meansinvolving a .cam and a plurality of levers disposed kbetween the cam and said manana plunger "for actuating said plunger whereby in one cycle of the cam action, the plunger will be retained in a raised position in said chamber through substantially three quarters of such cycle of operation and whereby in substantially the other quarter of the cycle of operation, said plunger is given sudden downward movement to admit oil into said chamber and successive upward movement to displace the oil admitted into said chamber in the downward movement of the plunger, and automatically operated means for imparting movement to one of said levers to control and regulate the movement imparted to said plunger.

10. A pump mechanism for discharging fuel oil under high pressure from a suitable spray nozzle, comprising a pump body in which is formed a pump chamber, means for supplying oil to said chamber and a discharge pipe in communication with said chamber, a plunger mounted in said body and extending into said chamber, means involving a cam and a plurality of levers disposed between the cam and said lunger for actuating said. lunger where y in onecycle ot the cam action, the plunger will be retained in a raised position in said chamber through substantially three quarters of such cycle of operation and whereby in'substantially the other quarter ot the cycle of operation, said plunger is given sudden downward movement to admit oil into said chamber and successive upward movevment to displace the oil admitted into said chamber in the downward movement of the plunger, automatically operated means for imparting movement to one of said levers to control and regulate the movement imparted to said plunger, and check valves in said supply means and said discharge pipe.

ln testimon that ll claim the foregoing as my invention have signed my name this 23rd day of July, 1923.

CARL H. KN'UDSEN, 

